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纳米管和纳米线中的计算纳米力学与热输运

Computational nanomechanics and thermal transport in nanotubes and nanowires.

作者信息

Srivastava Deepak, Makeev Maxim A, Menon Madhu, Osman Mohamed

机构信息

Advanced Aerospace Materials and Devices Group, UARC, NASA Ames Research Center, Moffett Field, CA 94035-1000, USA.

出版信息

J Nanosci Nanotechnol. 2008 Jul;8(7):3628-51.

Abstract

Representative results of computer simulation and/or modeling studies of the nanomechanical and thermal transport properties of an individual carbon nanotube, silicon nanowire, and silicon carbide nanowire systems have been reviewed and compared with available experimental observations. The investigated nanomechanical properties include different elastic moduli of carbon nanotubes, silicon nanowires, and silicon carbide nanowires, all obtained within their elastic limits. Moreover, atomistic mechanisms of elastic to plastic transition under external stresses and yielding of carbon nanotubes under experimentally feasible temperature and strain rate conditions are discussed in detail. The simulation and/or modeling results on thermal properties, presented in this work, include vibrational modes, thermal conductivity and heat pulse transport through single carbon nanotubes, and thermal conductivity of silicon nanowires.

摘要

本文综述了单个碳纳米管、硅纳米线和碳化硅纳米线系统的纳米力学和热输运性质的计算机模拟和/或建模研究的代表性结果,并与现有的实验观测结果进行了比较。所研究的纳米力学性质包括碳纳米管、硅纳米线和碳化硅纳米线在弹性极限内的不同弹性模量。此外,还详细讨论了在外部应力作用下弹性到塑性转变的原子机制以及在实验可行的温度和应变速率条件下碳纳米管的屈服情况。本文给出的热性质的模拟和/或建模结果包括振动模式、通过单个碳纳米管的热导率和热脉冲输运,以及硅纳米线的热导率。

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